package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐，同时需要保存套餐和商品的关联关系
     * @param setmealDTO
     */
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        //将setmealDTO中的数据保存到setmeal中
        Setmeal setmeal = new Setmeal();
        //拷贝
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //保存套餐数据
        setmealDishMapper.insert(setmeal);
        //获取insert语句生成的主键值
        Long setmealId = setmeal.getId();
        //向套餐和商品的关联表中插入数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //保存套餐和商品的关联数据
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        //获取当前页数
        int pageNum = setmealPageQueryDTO.getPage();
        //获取每页记录数
        int pageSize = setmealPageQueryDTO.getPageSize();
        //开始进行分页查询
        PageHelper.startPage(pageNum, pageSize);
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        PageResult pageResult = new PageResult();
        //设置总记录数
        pageResult.setTotal(page.getTotal());
        //设置当前页数据
        pageResult.setRecords(page.getResult());
        return pageResult;
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //起售中的套餐不能删除
        for (Long id : ids) {
            //获取套餐状态
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == 1) {
                //起售中的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        //删除套餐表中的数据
        setmealMapper.deleteByIds(ids);

        //删除套餐和商品的关联数据
        setmealDishMapper.deleteBySetmealIds(ids);

    }

    /**
     * 套餐起售停售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售商品，有停售商品提示"套餐内包含未启售商品，无法启售"
        if(status == StatusConstant.ENABLE){
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if(StatusConstant.DISABLE == dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .status(status)
                .id(id)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 根据id查询套餐和套餐项
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        //查询套餐数据
        Setmeal setmeal = setmealMapper.getById(id);
        //查询套餐项数据
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        //组装VO数据并返回
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {

        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //修改套餐数据
        setmealMapper.update(setmeal);

        //获取修改的套餐id
        Long setmealId = setmeal.getId();

        //删除套餐和商品的关联数据
        setmealDishMapper.deleteBySetmealId(setmealId);

        //插入新的套餐和商品的关联数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        //批量插入
        setmealDishMapper.insertBatch(setmealDishes);

    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询商品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

}
